The biological success of any implant therapy depends on the presence of a protective bone wall of at least 1mm around implants. This raises the issue of bone resorption; atrophied bone mass is often incompatible with the conventional placement of the selected implant and bone requires a surgical intervention before or along with implant placement. The bone expansion technique is indicated in cases of horizontal bone resorption: surgical enlargement of the ridge allows, at the end of a single session, immediate implants placement with a success rate of 97%. Compared with other regenerative techniques, bone expansion allows a significant reduction in the duration and cost of treatment. Nevertheless, it seems complicated to undertake in high bone density
sites and suffer from the drawbacks of traditional instrumentation. Atraumatic bone expansion technique is a simplified answer to the problems of the conventional technique. By the association of piezosurgery and conical expanders, it allows risk reduction and optimal operating comfort. This work aims to illustrate, through a clinical case, the protocol of atraumatic bone expansion technique emphasizing its indications and limitations.

The biological success of any implant therapy depends on the presence of a protective bone wall of at least 1mm around implants. This raises the issue of bone resorption; atrophied bone mass is often incompatible with the conventional placement of the selected implant and bone requires a surgical intervention before or along with implant placement. The bone expansion technique is indicated in cases of horizontal bone resorption: surgical enlargement of the ridge allows, at the end of a single session, immediate implants placement with a success rate of 97%. Compared with other regenerative techniques, bone expansion allows a significant reduction in the duration and cost of treatment. Nevertheless, it seems complicated to undertake in high bone density
sites and suffer from the drawbacks of traditional instrumentation. Atraumatic bone expansion technique is a simplified answer to the problems of the conventional technique. By the association of piezosurgery and conical expanders, it allows risk reduction and optimal operating comfort. This work aims to illustrate, through a clinical case, the protocol of atraumatic bone expansion technique emphasizing its indications and limitations.

The retention problems and instability are the main complaint in partial and complete removable prosthetics. In complete removable prosthetics (CRP), the preservation of roots with copes equipped with axial attachments or with a conjunction bar is indicated when we are in the presence of a reduced number of teeth of the ratio crown / root clinic is unfavorable. The reduction of the clinical crown will allow more easily establish a balanced occlusion and solve the aesthetic problem. In partial removable prosthetics (PRP), the difference in compressibility between the
periodontal ligament of the remaining teeth and edentulous ridges fibro mucosa is a pitfall to avoid ensuring stability, comfort and durability of the prosthetic restoration and anato- mical structures. Equipped with an attachment, the implant allows proposing the prosthetic design best suited to control the different movements that
could destabilize the prosthesis.Sub-root or sub-implant removable prosthetics are comparable in their advantages,
disadvantages and biomechanical principles. Indeed, the exploitation of natural roots or implants promotes prosthetic treat- ment at functional, psychological and biological levels.

The retention problems and instability are the main complaint in partial and complete removable prosthetics. In complete removable prosthetics (CRP), the preservation of roots with copes equipped with axial attachments or with a conjunction bar is indicated when we are in the presence of a reduced number of teeth of the ratio crown / root clinic is unfavorable. The reduction of the clinical crown will allow more easily establish a balanced occlusion and solve the aesthetic problem. In partial removable prosthetics (PRP), the difference in compressibility between the
periodontal ligament of the remaining teeth and edentulous ridges fibro mucosa is a pitfall to avoid ensuring stability, comfort and durability of the prosthetic restoration and anato- mical structures. Equipped with an attachment, the implant allows proposing the prosthetic design best suited to control the different movements that
could destabilize the prosthesis.Sub-root or sub-implant removable prosthetics are comparable in their advantages,
disadvantages and biomechanical principles. Indeed, the exploitation of natural roots or implants promotes prosthetic treat- ment at functional, psychological and biological levels.

Introduction: mucositis and peri-implantitis are peri-implant inflammatory pathologies of infectious origin occurring around implants in function. Several animal studies suggest the role of surface conditions in the development of peri-implantitis, but the results remain contradictory and difficult to reproduce in humans. The purpose of this systematic review was to find out the impact of those physical and chemical characteristics of implant surface on the risk for occurrence of periimplantitis. Materials and Methods:from 2004 to 2014, a systematic review was carried out by means of an electronic search strategy in Medline, Embase, Cochrane Library and Dentistry and Oral Sciences Source, and in the manual search in journalsof periodontology and of implant dentistry.Results: the strategy has helped found 389 papers selected for inclusion in the study, and after application of filters and criteria, only 3 scientific articles have been selected for further analysis. Conclusion:the condition of implant surfaces, whatever rough or smooth, has no direct influence on the onset of peri-implant disease, except in the presence of other risk factors for peri-implantitis.

Introduction: mucositis and peri-implantitis are peri-implant inflammatory pathologies of infectious origin occurring around implants in function. Several animal studies suggest the role of surface conditions in the development of peri-implantitis, but the results remain contradictory and difficult to reproduce in humans. The purpose of this systematic review was to find out the impact of those physical and chemical characteristics of implant surface on the risk for occurrence of periimplantitis. Materials and Methods:from 2004 to 2014, a systematic review was carried out by means of an electronic search strategy in Medline, Embase, Cochrane Library and Dentistry and Oral Sciences Source, and in the manual search in journalsof periodontology and of implant dentistry.Results: the strategy has helped found 389 papers selected for inclusion in the study, and after application of filters and criteria, only 3 scientific articles have been selected for further analysis. Conclusion:the condition of implant surfaces, whatever rough or smooth, has no direct influence on the onset of peri-implant disease, except in the presence of other risk factors for peri-implantitis.

The use of a product that accelerates healing after surgery or trauma is a very attractive idea. After a tissue destruction, growth factors naturally occur during healing phases or tissue repair or regeneration. The injection of a platelet concentrate is followed by an increase in growth factor in the surgical site .this will enable a faster healing. [1-4] These growth factors are releasedby platelet release. To concentrate these factors it seems worthwhile to isolate platelets, concentrate and reinjecting them into the surgical site. Several techniques are used isolate platelets such as PRP, PRF and MPM. All these products are based on platelet concentrates. The result of these products is different
in platelets concentration. However, the time and the spin speed will influence on the platelets concentration
We know that the more the time and the spin speed are shorter, the more the number of isolated platelets is important. We tried in this study to determine the optimal time and spin speed to obtain the
higher concentration of platelets.

The use of a product that accelerates healing after surgery or trauma is a very attractive idea. After a tissue destruction, growth factors naturally occur during healing phases or tissue repair or regeneration. The injection of a platelet concentrate is followed by an increase in growth factor in the surgical site .this will enable a faster healing. [1-4] These growth factors are releasedby platelet release. To concentrate these factors it seems worthwhile to isolate platelets, concentrate and reinjecting them into the surgical site. Several techniques are used isolate platelets such as PRP, PRF and MPM. All these products are based on platelet concentrates. The result of these products is different
in platelets concentration. However, the time and the spin speed will influence on the platelets concentration
We know that the more the time and the spin speed are shorter, the more the number of isolated platelets is important. We tried in this study to determine the optimal time and spin speed to obtain the
higher concentration of platelets.

Lip repositioning An innovative technique for correcting the gummy smile Excessive exposure of the gums known as the "gummy smile" is an issue affecting a large percentage of the population. according to some studies with prevalence ranging from 10.5% (* 1) to 29%. (* 4)This is a condition in which an overexposure of the maxillary gingiva (> 3 mm)is present while smiling. The correct diagnosis and determining its etiology is essential for choosing the right treatment. (* 7) (* 14). Hyperactivity of the elevator muscle ofthe lip is one of the main causes of a gummy smile. In fact, several techniques have been proposed for its treatment. (* 6)The repositioning of the upper lip is a simple surgical procedure designed to correct a gummysmile due to hypermobility of the upper lip. She is described as a plastic surgery by Rubinstein in 1973. (* 2)he goal of intervention is to limit the retraction of the levator muscles of the upper lip to minimize the gum exposure and thus reduce the gummy smile. (*3, *5)

Lip repositioning An innovative technique for correcting the gummy smile Excessive exposure of the gums known as the "gummy smile" is an issue affecting a large percentage of the population. according to some studies with prevalence ranging from 10.5% (* 1) to 29%. (* 4)This is a condition in which an overexposure of the maxillary gingiva (> 3 mm)is present while smiling. The correct diagnosis and determining its etiology is essential for choosing the right treatment. (* 7) (* 14). Hyperactivity of the elevator muscle ofthe lip is one of the main causes of a gummy smile. In fact, several techniques have been proposed for its treatment. (* 6)The repositioning of the upper lip is a simple surgical procedure designed to correct a gummysmile due to hypermobility of the upper lip. She is described as a plastic surgery by Rubinstein in 1973. (* 2)he goal of intervention is to limit the retraction of the levator muscles of the upper lip to minimize the gum exposure and thus reduce the gummy smile. (*3, *5)